public void ThenByDescendingEmptySource()
 {
     EmptyData.OrderBy(x => true).ThenByDescending(x => x).AssertEmpty();
 }
 public void OrderByEmptySource()
 {
     EmptyData.OrderBy(x => x).AssertEmpty();
 }
 public void ThenByDescendingWithComparerEmptySource()
 {
     EmptyData.OrderBy(x => true).ThenByDescending(x => x, Comparer <object> .Default).AssertEmpty();
 }
 public void OrderByWithComparerEmptySource()
 {
     EmptyData.OrderBy(x => x, Comparer <object> .Default).AssertEmpty();
 }